US7511668B2 - Antenna device, radio device, and electronic instrument - Google Patents

Antenna device, radio device, and electronic instrument Download PDF

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US7511668B2
US7511668B2 US10/545,313 US54531304A US7511668B2 US 7511668 B2 US7511668 B2 US 7511668B2 US 54531304 A US54531304 A US 54531304A US 7511668 B2 US7511668 B2 US 7511668B2
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antenna
substrate
disposed
patterns
antenna patterns
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US20060208949A1 (en
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Takayuki Hirabayashi
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Redwood Technologies LLC
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Sony Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
    • H01Q1/2275—Supports; Mounting means by structural association with other equipment or articles used with computer equipment associated to expansion card or bus, e.g. in PCMCIA, PC cards, Wireless USB
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the present invention relates to an antenna apparatus having a plurality of antenna elements; a wireless apparatus therewith; and an electronic apparatus therewith.
  • a wireless communication function has been mounted on not only information processing devices, such as personal computers, and communication terminal devices, such as cellular phones and PDAs (Personal Digital Assistances), but also various types of consumer electronic devices, such as audio devices, video devices, camera devices, printers, and entertainment robots.
  • the wireless communication function has been mounted on wireless LAN (Local Area Network) access points and small accessory cards.
  • the accessory cards are wireless card modules having both a storage function and a wireless communication function.
  • wireless card modules are for example PCMCIA (Personal Computer Memory Card International Association) type cards, compact flash cards, mini PCI (Peripheral Component Interconnection) cards.
  • antennas that receive and transmit radio waves have needed various shapes and characteristics. For example, antennas that can deal with a wide frequency band and multiple frequencies have been needed.
  • antennas For example, for 5 GHz band used in the wireless LAN, antennas have been needed for 4.9 GHz band and 5.8 GHz band that are wider than the existing 5.15 to 5.35 GHz bands.
  • antennas are needed to cover both the frequency bands 2.4-2.5 GHz and 5.15-5.35 GHz.
  • UWB ultra wide band
  • antennas need to cover wide bands of 3.1 GHz-10.6 GHz.
  • UHF bands 400-800 MHz
  • high speed wide band milli-wave communication systems 25 GHz band, 60 GHz band, and so forth
  • an antenna is designed to have a main resonance and a sub resonance
  • an antenna is designed to broaden a frequency band with one resonance.
  • the method (1) of these methods has been widely used in many commercial antennas.
  • the method (1) sacrifices characteristics such as “deterioration of return loss characteristics” “narrow frequency band” in one of a plurality of bands.
  • the method (2) sacrifices a gain of a radio wave in a widened band because the band and gain have a reversely proportional relationship.
  • FIG. 17 shows an example of an antenna substrate having a plurality of antenna patterns.
  • FIG. 17A is a plan view showing one principal surface S 3 of an antenna substrate 101 .
  • FIG. 17B is a plan view showing another principal surface S 4 of the antenna substrate 101 .
  • the principal surface S 3 of the antenna substrate 101 has a first antenna pattern 102 a .
  • the other principal surface S 4 of the antenna substrate 101 has a second antenna pattern 102 b .
  • the first antenna pattern 102 a is an antenna pattern corresponding to frequency bands 4.9-5.35 GHz, an antenna pattern corresponding to frequency bands 2.4-2.5 GHz, or an antenna pattern for a DT (Digital Television) corresponding to frequency bands 400-800 MHz.
  • the second antenna pattern 102 b is an antenna pattern corresponding to frequency bands 5.35 GHz-5.8 GHz or an antenna pattern corresponding to milli-wave bands.
  • the first antenna pattern 102 a and the second antenna pattern 102 b disposed on both the principal surfaces largely interfere with each other. As a result, characteristics of the antenna deteriorate.
  • the first antenna pattern 102 a and the second antenna pattern 102 b have to be disposed on the antenna substrate 101 with a sufficient clearance area.
  • an object of the present invention is to provide an antenna apparatus that allows a plurality of antenna patterns to be closely disposed and deterioration of characteristics due to interference of antenna patterns to be suppressed; a wireless apparatus therewith; and an electronic apparatus therewith.
  • the first invention is an antenna apparatus, comprising:
  • the antenna patterns being made of an electroconductive plastic
  • the substrate is made of a solid electrolyte.
  • the substrate also have a separator and that solid electrolyte layers made of the solid electrolyte be disposed on both surfaces of the separator.
  • the plurality of antenna patterns typically correspond to different frequency bands.
  • the plurality of antenna patterns are typically linear patterns.
  • the substrate is typically a planar substrate.
  • the plurality of antenna patterns are typically disposed on either or both principal surfaces of the substrate.
  • a base plate made of a metal be disposed on the other principal surface of the substrate.
  • the plurality of antenna patterns are typically planner patterns.
  • ions can be doped from the substrate to an antenna pattern having one potential, whereas ions can be undoped from another antenna pattern having the other potential to the substrate.
  • the antenna pattern having one potential can become a conductor, whereas the antenna pattern having the other potential can become an insulator.
  • the second invention is a wireless apparatus that is connected to a device and that allows it to additionally have a wireless function, the wireless apparatus comprising:
  • a switch that selects the plurality of antenna patterns so that one of the plurality of antenna patterns has one potential and the other of the plurality of antenna patterns has another potential when a DC voltage is applied between the plurality of antenna patterns;
  • the antenna patterns are made of an electroconductive plastic
  • the substrate is made of a solid electrolyte.
  • the substrate also have a separator and that solid electrolyte layers made of the solid electrolyte be disposed on both surfaces of the separator.
  • the plurality of antenna patterns typically correspond to different frequency bands.
  • the plurality of antenna patterns are typically linear patterns.
  • the substrate is typically a planar substrate.
  • the plurality of antenna patterns are typically disposed on either or both principal surfaces of the substrate.
  • a base plate made of a metal be disposed on the other principal surface of the substrate.
  • the plurality of antenna patterns are typically planner patterns.
  • ions can be doped from the substrate to an antenna pattern having one potential, whereas ions can be undoped from another antenna pattern having the other potential to the substrate.
  • the antenna pattern having one potential can become a conductor, whereas the antenna pattern having the other potential can become an insulator.
  • the third invention is an electronic apparatus having a wireless communication function that transmits and receives information, the electronic apparatus comprising:
  • a switch that selects the plurality of antenna patterns so that one of the plurality of antenna patterns has one potential and the other of the plurality of antenna patterns has another potential when the DC voltage is applied between the plurality of antenna patterns
  • the antenna patterns are made of an electroconductive plastic
  • the substrate is made of a solid electrolyte.
  • the substrate also have a separator and that solid electrolyte layers made of the solid electrolyte be disposed on both surfaces of the separator.
  • the plurality of antenna patterns typically correspond to different frequency bands.
  • the plurality of antenna patterns are typically linear patterns.
  • the substrate is typically a planer substrate.
  • the plurality of antenna patterns are typically disposed on either or both principal surfaces of the substrate.
  • a base plate made of a metal be disposed on the other principal surface of the substrate.
  • the plurality of antenna patterns are typically planner patterns.
  • ions can be doped from the substrate to an antenna pattern having one potential, whereas ions can be undoped from another antenna pattern having the other potential to the substrate.
  • the antenna pattern having one potential can become a conductor, whereas the antenna pattern having the other potential can become an insulator.
  • ions can be doped from the substrate to an antenna pattern having one potential, whereas ions can be undoped from another antenna pattern having the other potential to the substrate.
  • the antenna pattern having one potential can become a conductor, whereas the antenna pattern having the other potential can become an insulator.
  • FIG. 1 is a schematic diagram showing an example of an electronic apparatus to which a wireless apparatus according to a first embodiment of the present invention is mounted;
  • FIG. 2 is a perspective view showing an example of a wireless apparatus 1 disposed in a housing;
  • FIG. 3 is a plan view showing an antenna apparatus according to the first embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing examples of antenna patterns
  • FIG. 5 is a sectional view showing an example of the structure of the antenna apparatus according to the first embodiment of the present invention.
  • FIG. 6 is a block diagram showing an example of the structure of an antenna apparatus control circuit disposed in the wireless apparatus according to the first embodiment of the present invention
  • FIG. 7 is a block diagram showing an example of the structure of a signal process circuit disposed in the wireless apparatus according to the first embodiment of the present invention.
  • FIG. 8 is a sectional view describing an example of the operation of the wireless apparatus according to the first embodiment of the present invention.
  • FIG. 9 is a sectional view showing an example of the structure of an antenna apparatus according to a second embodiment of the present invention.
  • FIG. 10 is a block diagram showing an example of the structure of an antenna apparatus control circuit disposed in a wireless apparatus according to the second embodiment of the present invention.
  • FIG. 11 is a sectional view describing an example of the operation of the wireless apparatus according to the second embodiment of the present invention.
  • FIG. 12 is a sectional view showing an example of the structure of a wireless apparatus according to a third embodiment of the present invention.
  • FIG. 13 is a block diagram showing an example of the structure of an antenna apparatus control circuit disposed in the wireless apparatus according to the third embodiment of the present invention.
  • FIG. 14 is a sectional view showing an example of the structure of an antenna apparatus according to a fourth embodiment of the present invention.
  • FIG. 15 is a block diagram showing an example of the structure of an antenna apparatus control circuit disposed in a wireless apparatus according to the fourth embodiment of the present invention.
  • FIG. 16 is a block diagram showing an example of the structure of a signal process circuit disposed in the wireless apparatus according to the fourth embodiment of the present invention.
  • FIG. 17 is a schematic diagram showing a conventional antenna apparatus.
  • FIG. 18 is a schematic diagram showing a conventional antenna apparatus.
  • FIG. 1 shows an example of an electronic apparatus to which a wireless apparatus 1 according to a first embodiment of the present invention is attached.
  • the wireless apparatus 1 is composed of a wireless apparatus main body 3 and an antenna apparatus 2 disposed at one end of the wireless apparatus main body 3 .
  • the wireless apparatus 1 is a wireless card module that has for example a storage function and a wireless communication function.
  • the wireless card module is for example a PCMCIA type card, a compact flash card, a mini PCI card, or the like.
  • the wireless apparatus 1 has a structure that can be freely attached to and detached from a slot 12 disposed in an electronic apparatus 11 such as a personal computer. Specifically, as shown in FIG. 1 , the wireless apparatus 1 is attached to the slot 12 so that one end of the wireless apparatus main body 3 , which is the antenna apparatus 2 , protrudes from the electronic apparatus 11 . With the wireless apparatus 1 , a predetermined extension function and a wireless communication function are provided to the electronic apparatus 11 . In addition, the wireless apparatus 1 has a storage function that exchanges data with the electronic apparatus 11 .
  • FIG. 2 is a perspective view showing an example of the wireless apparatus 1 disposed in a housing.
  • the wireless apparatus main body 3 is composed of a main body substrate 31 having a rectangle shape viewed from the above of its principal surface; a connection terminal 32 disposed on one shorter side of the rectangle; and a circuit portion 33 disposed at a center portion of the wireless apparatus 1 .
  • the connection terminal 32 is a connector portion based on for example the PCMCIA standard.
  • the antenna apparatus 2 mainly has a planar antenna substrate 21 and a plurality of antenna patterns 22 disposed on both principal surfaces of the antenna substrate 21 .
  • the antenna apparatus 2 is disposed on the other shorter side opposite to the connection terminal 32 .
  • the antenna apparatus 2 has a rectangle shape viewed from its principal surface. The length of each of the longer sides of the rectangle is slightly smaller than the width of the main body substrate 31 . The length of each of the shorter sides of the antenna apparatus 2 is slightly larger than the height of the opening of the slot 12 of the electronic apparatus 11 .
  • a longer side portion of the antenna apparatus 2 has a connection portion that connects the antenna apparatus 2 and the main body substrate 31 .
  • FIG. 3A is a plan view showing one principal surface of the antenna apparatus 2 according to the first embodiment of the present invention.
  • FIG. 3B is a plan view showing the other principal surface of the antenna apparatus 2 according to the first embodiment of the present invention.
  • an antenna pattern 22 a is disposed on one principal surface S 1 of the antenna substrate 21 .
  • An antenna pattern 22 b is disposed on the other principal surface S 2 of the antenna substrate 21 .
  • Electrodes 25 a and 25 b are disposed on the antenna pattern 22 a on the connection portion side of the antenna substrate 21 .
  • Electrodes 26 a and 26 b are disposed on the antenna pattern 22 b on the connection portion side of the antenna substrate 21 .
  • the electrodes 25 a , 25 b , 26 a , and 26 b are made of for example a metal such as copper.
  • the electrodes 25 a and 25 b are connected to the signal process circuit of the circuit portion 33 .
  • the electrodes 25 b and 26 b are connected to a ground pattern disposed on the circuit portion 33 .
  • the antenna patterns 22 a and 22 b correspond to different frequency bands.
  • the frequency bands are for example 5 GHz bands, 2.4 GHz bands, milli-wave bands, micro-wave bands, and UHF bands.
  • FIG. 4 shows examples of the antenna patterns 22 .
  • the antenna patterns 22 are for example linear patterns or planar patterns.
  • the linear patterns are for example Zepp type ( FIG. 4A ), monopole type ( FIG. 4B ), dipole type ( FIG. 4C ), inverse F type, and meander type.
  • the planner patterns are for example micro-strip type antenna, and PIFA (Planer Inverted F Antenna).
  • the antenna apparatus 2 is provide with a base plate.
  • the antenna patterns 22 a and 22 b are dipole type antenna elements, they are balance-fed.
  • FIG. 5 is a sectional view showing an example of the structure of the antenna substrate 21 .
  • the antenna substrate 21 is composed of an electrolyte layer 24 b , a separator 23 , and an electrolyte layer 24 a that are layered in the order.
  • the antenna patterns 22 a and 22 b are disposed on the electrolyte layers 24 a and 24 b , respectively.
  • the antenna patterns 22 a and 22 b are made of an electroconductive plastic.
  • the electroconductive plastic When the electroconductive plastic is doped with ions, it becomes an electroconductive resin like a metal. When the electroconductive plastic is undoped, it becomes an insulative resin.
  • the electroconductive plastic that can be used and known is for example polyacetylene, polythiophene, polypyrrole, polyaniline, or polyazulen.
  • the antenna patterns 22 a and 22 b can be disposed in one of the following methods.
  • molten electroconductive plastic is coated on the electrolyte layers 24 a and 24 b for desired patterns and then hardened.
  • molten electroconductive plastic is shaped in desired antenna patterns and hardened, they are disposed on the electrolyte layers 24 a and 24 b .
  • film-shaped electroconductive plastic is formed by electrolytic polymerization. The electroconductive plastic is cut or punched out in desired shapes and disposed on the electrolyte layers 24 a and 24 b.
  • the antenna patterns 22 a and 22 b be stably secured on the solid electrolyte layers 24 a and 24 b , respectively.
  • the antenna patterns 22 a and 22 b are adhered to the solid electrolyte layers 24 a and 24 b , respectively, with an adhesive agent.
  • the antenna patterns 22 a and 22 b are coated with a sheet.
  • concave portions corresponding to the shapes of the antenna patterns 22 a and 22 b are formed in the solid electrolyte layers 24 a and 24 b , respectively.
  • the antenna patterns 22 a and 22 b are fit to the concave portions.
  • the antenna patterns 22 a and 22 b are secured to the solid electrolyte layers 24 a and 24 b with securing members or the like. As another method, these methods may be combined.
  • the thickness of the adhesive agent needs to be decreased so that ions can easily migrate.
  • the material of the sheet that covers the antenna patterns 22 a and 22 b be a material that is free of deterioration of radio wave characteristics thereof and that has flexibility.
  • the material of the sheet is for example polycarbonate (PC), acrylonitorile-butadiene-styrene (ABS), or polyimide.
  • the solid electrolyte layers 24 a and 24 b have a rectangle shape viewed from the above of their principal surfaces.
  • the solid electrolyte layers 24 a and 24 b contain ions (dopants) that are doped to electroconductive plastic. These ions are cations or anions.
  • the solid electrolyte that composes the solid electrolyte layers 24 a and 24 b are for example solid electrolyte used for battery cells such as lithium ion battery cells (lithium polymer battery cells), and fuel battery cells.
  • the solid electrolytic that composes the solid electrolyte layers 24 a and 24 b may be inorganic electrolyte, polymer electrolyte, or gel-type electrolyte of which electrolyte is mixed with a highly polymerized compound.
  • the gel-type electrolyte is composed of for example plasticizing agent containing lithium salt and 2% to 30% by percent of a matrix polymer. At this point, an ester group, an ether group, or a carbonate group may be used as a single component or one component of plasticizing agent.
  • polymeric material of the solid electrolyte layers 24 a and 24 b for example silicon gel, acrylic gel, polysaccharide group polymer, acrylonitrile gel, polyphosphazen denatured polymer, polyethylene oxide, polypropylene oxide, composite polymer thereof, cross-linked polymer thereof, or denatured polymer thereof, fluorinated polymer, such as poly(vinylidene fluororide), poly(vinylidene fluororide-co-hexafluoropropylene), poly(vinylidene fluororide-co-tetrafluoropropylene), poly(vinylidene fluororide-co-trifluoropropylene), or a mixture thereof can be used.
  • fluorinated polymer such as poly(vinylidene fluororide), poly(vinylidene fluororide-co-hexafluoropropylene), poly(vinylidene fluororide-co-tetrafluoropropylene), poly
  • the electrolyte salt is for example lithium salt or sodium salt.
  • the lithium salt is for example a regular lithium salt used for an electrolytic solution of a regular battery cell.
  • the lithium salt is for example as follows, but not limited thereto.
  • the lithium salt is for example lithium chloride, lithium bromide, lithium iodide, lithium chlorate, lithium perchlorate, lithium bromate, lithium iodate, lithium nitrate, tetrafluoro lithium borate, hexafluoro lithium phosphate, lithium acetate, bis(trifluoro methane sulfonyl) imidolithium, LiAsF 6 , LiCF 3 SO 3 , LiC(SO 2 CF 3 ) 3 , LiAlCl 4 , or LiSiF 6 .
  • a single compound or a mixture of two or more compounds of these lithium compounds may be used.
  • the separator 23 has a rectangle sheet shape when viewed from the above of its principal surface.
  • the separator 23 is used to separate the solid electrolyte layers 24 a and 24 b .
  • a separator that is known for regular battery cells can be used.
  • the separator 23 is for example a porous film made of a polyolefin type material such as polypropylene or polyethylene; a porous film made of an inorganic material such as a nonwoven substance of a ceramic material; or a laminate of two or more types of these materials.
  • the separator 23 may be omitted.
  • FIG. 6 is a block diagram showing an example of the structure of an antenna apparatus control circuit that controls the antenna apparatus 2 according to the first embodiment of the present invention.
  • the antenna apparatus control circuit mainly has bias circuits 45 and 46 and switches 42 , 43 , and 44 .
  • the switch device 42 is connected to a radio frequency signal circuit block 41 .
  • the antenna pattern 22 a Disposed on the principal surface S 1 of the planer planar antenna substrate 21 is the antenna pattern 22 a . Disposed on the other principal surface S 2 is the antenna pattern 22 b .
  • the antenna pattern 22 a disposed on the principal surface S 1 is connected to a terminal 43 a of the switch device 43 through the bias circuit 45 .
  • a terminal 43 b of the switch device 43 is connected to a voltage source (not shown).
  • a terminal 43 c of the switch device 43 is grounded.
  • the antenna pattern 22 b disposed on the principal surface S 2 of the antenna apparatus 2 is connected to a terminal 44 a of the switch device 44 through the bias circuit 46 .
  • a terminal 44 b of the switch device 44 is connected to the voltage source (not shown).
  • a terminal 44 c of the switch device 44 is grounded.
  • the antenna pattern 22 a disposed on the principal surface S 1 of the antenna apparatus 2 is connected to a terminal 42 b of the switch device 42 .
  • the antenna pattern 22 b disposed on the other surface S 2 of the antenna apparatus 2 is connected to a terminal 42 c of the switch device 42 .
  • a terminal 42 a of the switch device 42 is connected to the radio frequency circuit block 41 .
  • a DC voltage V DC is applied between the terminal 43 b and the terminal 44 c .
  • the DC voltage V DC is applied between the terminal 44 b and the terminal 43 c .
  • the DC voltage V DC is applied between the terminal 43 b and the terminal 44 c so that the potential of the terminal 43 b side (the antenna 22 a side) becomes higher than that of the terminal 44 c side.
  • the DC voltage V DC is applied between the terminal 44 b and the terminal 44 c so that the potential of the terminal 44 b side (the antenna 22 b side) becomes higher than that of the terminal 44 c side.
  • the bias circuits 45 and 46 stably apply voltages to the antenna apparatus 2 .
  • the switch device 42 connects the radio frequency circuit block 41 to one of the antenna patterns 22 a and 22 b .
  • the switch devices 43 and 44 select the antenna pattern 22 a or 22 b to which the DC voltage V DC is applied so that the potential of the selected antenna pattern becomes higher than that of the non-selected antenna pattern. Specifically, when the terminals 43 a and 43 b are connected and the terminals 44 a and 44 c are connected, the DC voltage V DC is applied between the antenna patterns 22 a and 22 b so that the potential of the antenna pattern 22 a becomes higher than that of the antenna pattern 22 b .
  • the DC voltage V DC is applied between the antenna patterns 22 a and 22 b so that the potential of the antenna pattern 22 b becomes higher than that of the antenna pattern 22 a .
  • the switch devices 43 and 44 are controlled with a control signal supplied from for example the electronic apparatus 11 .
  • the switch devices 42 , 43 , and 44 be semiconductor switches (switch ICs (Integrated Circuits)) or RF-MEMSs (Micro Electro Mechanical System) switches.
  • FIG. 7 is a block diagram showing an example of the structure of the signal process circuit disposed in the wireless apparatus 1 according to the first embodiment of the present invention.
  • the signal process circuit is composed of a host interface (hereinafter referred to as the host I/F) 51 , base band circuits (hereinafter referred to as the BB circuits) 52 1 and 52 2 , radio frequency signal process circuits (hereinafter referred to as the RF circuits) 53 1 and 53 2 , a switch device 54 , and a switch device 55 .
  • the host I/F 51 allows the wireless apparatus 1 to communicate with the electronic apparatus 11 .
  • the BB circuits 52 1 and 52 2 are control circuits that perform processes such as modulation and demodulation of signals.
  • the RF circuits 53 1 and 53 2 are circuits that transmit and receive radio frequency signals.
  • the RF circuit 53 1 and the BB circuit 52 1 are circuits that correspond to the antenna pattern 22 a .
  • the RF circuit 53 2 and the BB circuit 52 2 are circuits that correspond to the antenna pattern 22 b .
  • the antenna pattern 22 a , the RF circuit 53 1 , and the BB circuit 52 1 are an antenna and circuits that correspond to 5 GHz bands (IEEE 802.11a), whereas the antenna pattern 22 a , the RF circuit 53 2 , and the BB circuit 52 2 are an antenna and circuits that correspond to 2.4 GHz bands (IEEE 802.11b/g).
  • the switch device 54 selects the RF circuit 53 1 or 53 2 to be connected to the switch device 55 .
  • the switch device 55 selects the antenna pattern 22 a or 22 b to be connected to the switch device 54 .
  • FIG. 8 is a sectional view describing an example of the operation of the wireless apparatus 1 according to the first embodiment.
  • ions doped to the antenna patterns 22 a and 22 b are anions.
  • the terminals 43 a and 43 b of the switch device 43 shown in FIG. 6 are connected.
  • the terminals 44 a and 44 c of the switch device 44 are connected.
  • the DC voltage V DC is applied to the antenna apparatus 2 so that the potential of the antenna pattern 22 a disposed on the principal surface S 1 becomes high and the potential of the antenna pattern 22 b disposed on the principal surface S 2 becomes low.
  • a DC current i DC flows as shown in FIG. 8 .
  • ions of the antenna pattern 22 b migrate to the solid electrolyte layer 24 b .
  • ions of the solid electrolyte layer 24 a migrate to the antenna pattern 22 a .
  • the antenna pattern 22 b becomes an insulator, whereas the antenna pattern 22 a becomes a conductor.
  • the terminals 42 a and 42 b of the switch device 42 are connected.
  • a radio frequency signal is supplied form the radio frequency circuit block 41 to the antenna pattern 22 a disposed on the principal surface S 1 .
  • the antenna apparatus 2 has the separator 23 ; the antenna substrate 21 composed of the solid electrolyte layers 24 a and 24 b disposed on both surfaces of the separator 23 ; the antenna pattern 22 a disposed on the solid electrolyte layer 24 a ; and the antenna pattern 22 b disposed on the solid electrolyte layer 24 b .
  • V DC DC voltage
  • ions can be doped to one of the antenna patterns 22 a and 22 b
  • ions can be undoped from the other.
  • one of the antenna patterns 22 a and 22 b can become a conductor, whereas the other can become an insulator.
  • the antenna apparatus 2 where the two antenna patterns 22 a and 22 b are closely disposed, namely, in the antenna apparatus 2 , which has the antenna substrate 21 , which does not have radio wave shield characteristics and is very thin, the antenna patterns 22 a and 22 b disposed on both surfaces of the antenna substrate 21 , the antenna patterns 22 a and 22 b do not interfere with each other.
  • the antenna patterns 22 a and 22 b disposed on both surfaces of the antenna substrate 21 , the antenna patterns 22 a and 22 b do not interfere with each other.
  • deterioration of the characteristic of the antenna apparatus 2 due to interference of the antenna patterns 22 a and 22 b can be suppressed.
  • the areas of the antenna patterns 22 a and 22 b can be remarkably decreased.
  • the degree of freedom of design of the antenna apparatus 2 can be remarkably improved.
  • the antenna patterns 22 a and 22 b which are made of an electroconductive plastic, are disposed on the solid electrolyte layers 24 a and 24 b and the antenna patterns 22 a and 22 b are actively selected from one to the other with a DC current, unlike the case that the plurality of antenna patterns are made of a metal, even if they are closely disposed, deterioration of the characteristics of the antenna apparatus 2 due to interference of the antenna patterns 22 a and 22 b can be suppressed.
  • a plurality of antenna patterns 22 a and 22 b for different frequency bands corresponding to for example milli-wave bands, IEEE 802.11a/b/g, DTV (Digital Television) tuner, and so forth can be closely disposed without deterioration of the characteristics of the antenna apparatus 2 .
  • the antenna apparatus 2 which can deal with multi-frequency bands and that is small, the wireless apparatus 1 therewith, and the electronic apparatus therewith can be provided.
  • antenna patterns such as Zepp, monopole, dipole, and patch antenna patterns can be freely disposed on either or both principal surfaces of the antenna substrate 21 .
  • the degree of freedom of design of the antenna apparatus 2 can be improved.
  • the antenna patterns 22 a and 22 b are made of a polymer, they have flexibility.
  • the antenna patterns 22 a and 22 b can be disposed in a wearable device. As a result, the degree of flexibility of design of the device can be improved.
  • one of the antenna patterns 22 a and 22 b to be functioned can be selected.
  • a plurality of antenna patterns 22 disposed on the antenna substrate 21 can be freely controlled corresponding to desired frequency characteristics.
  • the antenna patterns 22 a and 22 b are disposed on the respective principal surfaces of the antenna substrate 21 .
  • two antenna patterns 22 a and 22 b are disposed on one principal surface of an antenna substrate 21 .
  • similar or corresponding elements to those in the first embodiment are denoted by similar or corresponding reference numerals and their description will be omitted.
  • FIG. 9 is a sectional view showing an example of the structure of an antenna apparatus according to the second embodiment of the present invention.
  • the antenna apparatus 2 has a solid electrolyte layer 24 and antenna patterns 22 a and 22 b disposed on one principal surface S 1 of the solid electrolyte layer 24 .
  • FIG. 10 is a block diagram showing an example of the structure of an antenna apparatus control circuit that controls the antenna apparatus 2 according to the second embodiment of the present invention.
  • the antenna pattern 22 a disposed on the principal surface S 1 is connected to a terminal 43 a of a switch device 43 through a bias circuit 45 and connected to a terminal 42 b of a switch device 42 .
  • the antenna pattern 22 b disposed on the principal surface S 1 is connected to a terminal 44 a of a switch device 44 through a bias circuit 46 and connected to a terminal 42 c of the switch device 42 .
  • FIG. 11 is a sectional view describing an example of the operation of the wireless apparatus 1 according to the second embodiment of the present invention. Next, with reference to FIG. 10 and FIG. 11 , an example of the operation of the wireless apparatus 1 according to the second embodiment will be described.
  • the terminals 43 a and 43 b of the switch device 43 shown in FIG. 10 are connected.
  • the terminals 44 a and 44 c of the switch device 44 are connected.
  • a DC voltage VDC is applied to the antenna apparatus 2 so that the potential of the antenna pattern 22 a becomes high and the potential of the antenna pattern 22 b becomes low. In other words, a DC current i DC flows as shown in FIG. 11 .
  • ions of the antenna pattern 22 b migrate to the solid electrolyte layer 24 .
  • Ions of the solid electrolyte layer 24 migrate to the antenna pattern 22 a .
  • the antenna pattern 22 b becomes an insulator, whereas the antenna pattern 22 a becomes a conductor.
  • the terminals 42 a and 42 b of the switch device 42 are connected.
  • a radio frequency signal is supplied from the radio frequency circuit block 41 to the antenna pattern 22 a . Since the rest of the operation of the wireless apparatus 1 of the second embodiment is the same as that of the first embodiment, the description will be omitted.
  • the antenna substrate 21 is composed of only the solid electrolyte layer 24 .
  • an antenna substrate 21 is composed of a solid electrolyte layer 24 and a base plate disposed on one principal surface of the solid electrolyte 21 .
  • similar or corresponding elements to those in the first embodiment are denoted by similar or corresponding reference numerals and their description will be omitted.
  • FIG. 12 shows an example of the structure of an antenna apparatus 2 according to the third embodiment of the present invention.
  • FIG. 13 is a block diagram showing an example of the structure of an antenna apparatus control circuit that controls the antenna apparatus 2 according to the third embodiment of the present invention.
  • the antenna apparatus 2 according to the third embodiment is mainly composed of a solid electrolyte layer 24 ; antenna patterns 22 a and 22 b disposed on one principal surface S 1 of the solid electrolyte layer 24 ; and a base plate 26 disposed on the other principal surface of the solid electrolyte layer 24 .
  • the antenna patterns 22 a and 22 b are for example linear patterns or planar patterns.
  • the linear patterns are for example monopole type.
  • planar patterns are for example microstrip type antennas or PIFAs (Planer Inverted F Antennas).
  • PIFAs Plant Inverted F Antennas
  • FIG. 14 shows an example of the structure of an antenna apparatus 2 according to the fourth embodiment of the present invention.
  • Antenna patterns 22 a 1 and 22 a 2 are disposed on one principal surface S 1 of an antenna substrate 21 .
  • Antenna patterns 22 b 1 and 22 b 2 are disposed on another principal surface S 2 of the antenna substrate 21 .
  • FIG. 15 is a block diagram showing an example of the structure of an antenna apparatus control circuit that controls the antenna apparatus 1 according to the fourth embodiment of the present invention.
  • the antenna substrate 21 is omitted.
  • the antenna patterns 22 a 1 and 22 a 2 are disposed on the principal surface S 1 of the antenna substrate 21 .
  • the antenna patterns 22 b 1 and 22 b 2 are disposed on the principal surface S 2 of the antenna substrate 21 .
  • the antenna patterns 22 a 1 and 22 a 2 disposed on the principal surface S 1 are connected to terminals 61 a 1 and 61 a 2 , respectively.
  • Terminals 61 b 1 and 61 b 2 are grounded.
  • Terminals 61 c 1 and 61 c 2 are connected to a radio frequency circuit block 41 .
  • the antenna patterns 22 b 1 and 22 b 2 disposed on the principal surface S 2 are connected to terminals 62 a 1 and 62 a 2 , respectively.
  • Terminals 62 b 1 and 62 b 2 are grounded.
  • Terminals 62 c 1 and 62 c 2 are connected to the radio frequency circuit block 41 .
  • the terminals 61 c 1 , 61 c 2 , 62 c 1 , and 62 c 2 are connected to a voltage source (not shown) through a bias circuit 45 .
  • FIG. 16 shows an example of the structure of a signal process circuit disposed in the wireless apparatus 1 according to the fourth embodiment of the present invention.
  • a switch device 55 selects one of the antenna patterns 22 a 1 , 22 a 2 , 22 b 1 , and 22 b 2 to be connected to a switch device 54 .
  • the switch device 54 selects one of RF circuits 53 1 , 53 2 , 53 3 , and 53 4 to be connected to the switch device 55 .
  • the RF circuits 53 1 , 53 2 , 53 3 , and 53 4 are circuits that transmit and receive a radio frequency signal.
  • BB circuits 52 1 , 52 2 , 52 3 , and 52 4 are control circuits that perform processes such as modulation and demodulation of a signal.
  • the RF circuit 53 1 and the BB circuit 52 1 are circuits corresponding to the antenna 22 a 1 .
  • the RF circuit 53 2 and the BB circuit 52 2 are circuits corresponding to the antenna 22 b 1 .
  • the RF circuit 53 3 and the BB circuit 52 3 are circuits corresponding to the antenna 22 a 2 .
  • the RF circuit 53 4 and the BB circuit 52 4 are circuits corresponding to the antenna 22 b 2 .
  • the antenna pattern 22 a 1 , the RF circuit 53 1 , and the BB circuit 52 1 are an antenna and circuits corresponding to for example 5 GHz bands (IEEE 802.11a).
  • the antenna pattern 22 b 1 , the RF circuit 53 2 , and the BB circuit 52 2 are an antenna and circuits corresponding to for example 2.4 GHz bands (IEEE 802.11b/g).
  • the antenna pattern 22 a 2 , the RF circuit 53 3 , and the BB circuit 52 3 are an antenna and circuits corresponding to for example UHF bands (DTV).
  • the antenna pattern 22 b 2 , the RF circuit 53 4 , and the BB circuit 52 4 are an antenna and circuits corresponding to for example MMW (Millimeter wave) bands.
  • the terminals 61 a 1 and 61 c 1 of the switch device 61 1 are connected.
  • the terminals 61 a 2 and 61 b 2 of the switch device 61 2 are connected.
  • the terminals 62 a 1 and 62 b 1 of the switch device 62 1 are connected.
  • the terminals 62 a 2 and 62 b 2 of the switch device 62 2 are connected.
  • a DC voltage V DC is applied between the terminal 61 c 1 and the terminals 61 b 2 , 62 b 1 and 62 b 2 so that the potential of the antenna pattern 22 a 1 becomes high and the potentials of the antenna patterns 22 a 2 , 22 b 1 , and 22 b 2 become low.
  • ions of the antenna pattern 22 a 2 , 22 b 1 , and 22 b 2 migrate to the solid electrolyte layers 24 a and 24 b .
  • Ions of the solid electrolyte layer 24 a migrate to the antenna pattern 22 a 1 .
  • the antenna patterns 22 a 2 , 22 b 1 , and 22 b 2 become insulators, whereas the antenna pattern 22 a 1 becomes a conductor.
  • only the antenna pattern 22 a 1 which has been doped with ions, functions as an antenna.
  • a radio frequency wave is supplied from the radio frequency circuit block 41 to the antenna pattern 22 a 1 , which becomes a conductor. Since the rest of the operation of the antenna apparatus 2 of the fourth embodiment is the same as that of the first embodiment, the description thereof will be omitted.
  • values and structures described therein are only examples. If necessary, different values and structures may be used.
  • the solid electrolyte has for example a planar shape.
  • the solid electrolyte may have for example a spherical shape or a polyhedral shape such as an ellipsoid shape, a cubic shape, or a cuboid shape.
  • only one of a plurality of antenna patterns is doped with ions to function it as an antenna.
  • at least two of a plurality of antenna patterns may be doped with ions to function them as antennas.
  • a plurality of antenna patterns need to be paired and spaced so that they do not interfere with each other.
  • the present invention is applied to the wireless apparatus 1 , which can be attached to and detached from the electronic apparatus 11 such as a personal computer.
  • the present invention can be applied to an electronic apparatus that has a wireless communication function as a built-in function.
  • the present invention can be applied to a portable information device that has a wireless function.
  • the antenna apparatus 2 can be disposed at any position, the electronic apparatus such as a portable information device can be more miniaturized.
  • the antenna apparatus 2 according to the first, second, third, and fourth embodiments may be adhered on the front surface of the electronic apparatus such as a portable information terminal.
  • the space for the antenna apparatus 2 can be omitted.
  • the electronic apparatus such as a portable information terminal can be more miniaturized.
  • the present invention is applied to the wireless apparatus 1 .
  • the present invention may be applied to a wearable device.
  • a protective layer that covers the antenna pattern 22 of the antenna apparatus 2 may be additionally disposed.
  • the material of the protective layer needs to be a material that does not deteriorate the characteristics of radio waves of the antenna pattern 22 . With this structure, the durability of the antenna apparatus 2 can be improved.
  • a plurality of antenna patterns corresponding to different frequency bands are closely disposed. Instead, a plurality of antenna patterns corresponding to the same frequency band, but different center frequencies may be closely disposed to widen the frequencies with which the antenna apparatus 2 can deal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
US10/545,313 2003-12-19 2004-12-15 Antenna device, radio device, and electronic instrument Active 2025-05-23 US7511668B2 (en)

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JP2003423852A JP3988722B2 (ja) 2003-12-19 2003-12-19 アンテナ装置、無線装置および電子機器
JP2003-423852 2003-12-19
PCT/JP2004/019145 WO2005062417A1 (ja) 2003-12-19 2004-12-15 アンテナ装置、無線装置および電子機器

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US20060208949A1 US20060208949A1 (en) 2006-09-21
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EP (1) EP1696504B1 (de)
JP (1) JP3988722B2 (de)
KR (1) KR20060119700A (de)
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WO (1) WO2005062417A1 (de)

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US7724195B2 (en) 2005-12-28 2010-05-25 Fujitsu Component Limited Antenna apparatus
US20120313828A1 (en) * 2011-06-13 2012-12-13 Fujitsu Component Limited Memory card
US20130016017A1 (en) * 2011-07-11 2013-01-17 Kabushiki Kaisha Toshiba Card device
US20130093642A1 (en) * 2011-10-18 2013-04-18 Fujitsu Component Limited Antenna device
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JP2008167098A (ja) * 2006-12-28 2008-07-17 Nec Saitama Ltd アンテナ装置及び該アンテナ装置を用いた携帯無線機
KR100881120B1 (ko) * 2007-04-10 2009-02-11 주식회사 광현에어텍 휴대폰용 인테나 및 그 제조방법
JP2008278411A (ja) * 2007-05-07 2008-11-13 Mitsumi Electric Co Ltd アンテナ装置
TWI408844B (zh) * 2009-10-14 2013-09-11 Wistron Corp 通訊裝置及其主機板
US8514132B2 (en) * 2009-11-10 2013-08-20 Research In Motion Limited Compact multiple-band antenna for wireless devices
WO2012066452A1 (en) * 2010-11-15 2012-05-24 Koninklijke Philips Electronics N.V. Adjustable frequency-determining element
JP5901130B2 (ja) * 2011-03-29 2016-04-06 富士通コンポーネント株式会社 アンテナ装置、回路基板及びメモリカード
WO2013123109A1 (en) * 2012-02-14 2013-08-22 Molex Incorporated On radiator slot fed antenna
EP2663164B1 (de) 2012-05-10 2019-02-13 LG Innotek Co., Ltd. Kommunikationsmodul und Beleuchtungsvorrichtung damit
US10164338B2 (en) 2015-08-25 2018-12-25 Qualcomm Incorporated Multiple antennas configured with respect to an aperture
US10193219B2 (en) * 2016-11-11 2019-01-29 The Boeing Company System and method for reconfigurable polymer antenna
KR102067708B1 (ko) * 2018-06-26 2020-01-20 엘지전자 주식회사 안테나 모듈 및 그의 제조 방법과 안테나 모듈을 갖는 전자 기기
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US20080122629A1 (en) * 2005-06-28 2008-05-29 Takashi Yamagajo Radio frequency identification tag
US7724195B2 (en) 2005-12-28 2010-05-25 Fujitsu Component Limited Antenna apparatus
USRE44588E1 (en) * 2006-09-27 2013-11-12 Lg Electronics Inc. Antenna assembly and portable terminal having the same
US20120313828A1 (en) * 2011-06-13 2012-12-13 Fujitsu Component Limited Memory card
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JP3988722B2 (ja) 2007-10-10
JP2005184565A (ja) 2005-07-07
WO2005062417A1 (ja) 2005-07-07
EP1696504B1 (de) 2010-10-20
EP1696504A1 (de) 2006-08-30
DE602004029712D1 (de) 2010-12-02
EP1696504A4 (de) 2007-04-11
KR20060119700A (ko) 2006-11-24
CN1751417A (zh) 2006-03-22
US20060208949A1 (en) 2006-09-21
CN100530817C (zh) 2009-08-19

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